Ever want to sign up for some Web service and feel that tinge of pain when you input your email address? You realize you may have sold your soul, or at least left yourself open to a modicum of pain in the form of email offers for fake Rolexes or business deals in some tiny African country. To the rescue is Ten-Minute Mail, a service that provides you with a temporary email address that expires after ten minutes (or a bit longer if you need it). Don’t worry about keeping that crappy old Yahoo! or Hotmail address you use exclusively for signups — and if you never had an address like that, get those spam nightmares dancing right on out of your head and your inbox.